NEXUS

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Syntax:  cast nexus <target>

This spell is virtually identical to portal, with the only difference being
that while portal creates a one-way gate, a nexus spell makes a two-sided gate.
It also lasts longer than the lower-powered portal spell.  Like portal, it
requires an additional special power source known as a warp stone.  Most of
these are single use and are consumed by the casting energies of the spell...
but a few rare warp stones exist that can be used more than once before they
vanish into nothingness.  The nexus spell has been known to place a somewhat
greater strain on warp stones than does portal...

SEE ALSO: TRANSPORTATION, PORTAL, FARSIGHT, CASTING